<template>
  <div class="todo-footer" v-show="total">
		<label>
			<!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
			<!-- <input type="checkbox" :checked="isAll" @change="checkAll"/> -->
			<input type="checkbox"  v-model="isAll"/>
		</label>
		<span>
			<span>已完成{{donetotal}}</span>/全部{{total}}
		</span>
		<button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
	</div>
</template>

<script>
export default {
    name:'FooterTest',
	props:['todos','checkalltodo','clearalltodo'],
	computed:{
		total(){
			return this.todos.length;
		},
		donetotal(){
			return this.todos.reduce((pre,current)=>{
				return pre+(current.done?1:0)
			},0)
		},
		// isAll(){
		// 	return this.donetotal===this.total&&this.total>0

		// }
		isAll:{
			get(){
				return this.donetotal===this.total&&this.total>0
			},
			set(value){
				this.checkalltodo(value)
			}

		}
		
	},
	methods:{
		checkAll(e){
			console.log(e)
			this.checkalltodo(e.target.checked)
		},
		clearAll(){
			console.log("11111111111")
			this.clearalltodo()
		}
	}

}
</script>

<style>
/*footer*/
	.todo-footer {
		height: 40px;
		line-height: 40px;
		padding-left: 6px;
		margin-top: 5px;
	}

	.todo-footer label {
		display: inline-block;
		margin-right: 20px;
		cursor: pointer;
	}

	.todo-footer label input {
		position: relative;
		top: -1px;
		vertical-align: middle;
		margin-right: 5px;
	}

	.todo-footer button {
		float: right;
		margin-top: 5px;
	}
</style>